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Table 1

Information on observations.

Object (SDSS) RA Dec R Redshift Date Telescopea Filter Duration (h) Nb

J081250.80+522530.8 123.212 52.425 17.85 1.152 2011.2.12 L R 4.4 27
2012.1.27 L R 5.7 32
J085025.60+342750.9 132.607 34.464 18.51 1.389 2011.2.13 L R 3.3 20
J090107.64+384658.8 135.282 38.783 17.87 unknown 2012.1.29 L R 6.9 32
J094533.99+100950.1 146.392 10.164 17.45 1.662 2011.2.10 L V 6.1 25
2012.1.28 L R 6.0 34
J125219.48+264053.9 193.081 26.682 17.51 1.292 2011.4.23 X R 6.3 38
2013.4.14 X R 8.4 47
J132809.59+545452.8 202.040 54.915 17.59 2.096 2011.4.24 X R 4.6 48
J134601.29+585820.1 206.505 58.972 17.46 1.667 2011.4.25 X R 4.1 18
J142943.64+385932.2 217.432 38.992 17.26 0.930 2013.4.13 X R 6.2 33

Notes.

(a)

LLijiang 2.4 m, XXinglong 2.16 m;

(b)

number of exposures.

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